Wacom offers the Wacom Ink SDK for Verification, a software toolkit that organizations integrate into their document systems to automatically verify whether a handwritten electronic signature matches a registered reference, producing an instant accept/reject score in real time.

The verification engine compares a new handwritten e-signature against up to six stored reference signatures, analyzing biometric data including pen position, pressure, inclination, and speed of movement. It generates a similarity score between 0 and 1; the organization's workflow owner sets the acceptance threshold. The SDK is designed for real-time use at the point of signing and does not store signature data after verification, which Wacom states eliminates compliance issues. It is offered as a licensed SDK for integration by third-party solution providers into banking, healthcare, and other document-centric workflows.